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作 者:Abolghassem Emamverdian Abazar Ghorbani Necla Pehlivan James Barker Meisam Zargar Moxian Chen Guohua Liu
机构地区:[1]Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China [2]Bamboo Research Institute,Nanjing Forestry University,Nanjing,Jiangsu 210037,China [3]National Key Laboratory of Green Pesticide,Key Laboratory of Green Pesticide and Agricultural Bioengineering,Ministry of Education,Center for R&D of Fine Chemicals of Guizhou University,Guiyang,Guizhou 550025,China [4]Department of Biological Sciences,Recep Tayyip Erdogan University,Rize 53100,Turkiye [5]School of Life Sciences,Pharmacy,and Chemistry,Kingston University,Kingston-upon-Thames KT12EE,UK [6]Department of Agrobiotechnology,Institute of Agriculture,RUDN University,Moscow 117198,Russia
出 处:《Horticultural Plant Journal》2025年第2期737-757,共21页园艺学报(英文版)
基 金:financial support from the National Key Research and Development Program of China(Grant No.2023YFD220120302);supported by RUDN University Strategic Academic Leadership Program。
摘 要:The role of brassinosteroids(BRs)in enabling plants to respond effectively to adverse conditions is well known,though the precise mechanism of action that helps plants cope with arsenic(As)toxicity is still difficult to interpret.Therefore we tested the effect of brassinolide(BL)spray(0,0.5,and 1 mg·L^(-1))on As(0,and 10 mg·L^(-1))stressed tomato defense responses As stress led to the induction of oxidative stress,impaired chlorophyll and nitrogen metabolism,and Fe uptake,in conjunction with a reduction in plant growth and biomass.BL spray,on the contrary,protected the photo synthetic system and helped plants grow better under As stress.This was achieved by controlling the metabolism of chlorophyll and proline and lowering the amounts of methylglyoxal and H_(2)O_(2) through glyoxalaseⅠandⅡand antioxidant enzyme s.BL decreased arsenic accumulation by directing As sequestration towards vacuoles and increased Fe amount in the leaves and roots by regulating the expression of As(Lsil and Lsi2)and Fe(IRT1,IRT2,NRAMP1,and NRAMP3)transporters in As-stressed tomatoes.Furthermore,BL boosted adaptability against As phytotoxicity,while reducing the damaging impacts on photosynthesis,nitrogen metabolism,sulfur asimilation,and Fe absorption.These results offer a solid framework for the development of exogenous BRs-based breeding strategies for safer agricultural development.
关 键 词:Arsenic toxicity BRASSINOSTEROID Fe transporters Nitrogen metabolism Sulfur assimilation Oxidative stress
分 类 号:X173[环境科学与工程—环境科学] S641.2[农业科学—蔬菜学]
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